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' (Model.) 2 Sheets-Sheet 1.

L. C. BAU.

LOCK.

No. 369,030. I Patented Aug. 30, 1887.

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LOCK.

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wd n L O H au www UNITED STATES PATENT EEICE.

y LOUIS CARL RAU, OF GALVESTON, TEXAS.

LOCK.

SPECIFICATION forming part. of Letters Patent No. 369,030, dated August30, 1887.

Appncation inea Jun@ is, 1887. serial No. 241,190. (Monti.)

To all whom it may concern.- y

Beit known that I, LoUrs CARL BAU, a citizen of the United States,residing at Galveston,

tion.

My invention relates to an improvement in locks; and it consists in thenovel construclion, arrangement, and combination of the parts of thesame, which will be more fully hereinafter described, and pointed out inthe claims. Y

The object of my invention is to provide a lock for doors, safes,drawers, and the like, the bolt of which is adapted to be unlocked fromthe outside by means of a combination, and whilefbeing released willinstantly ring the door-bell by means of connecting Wires, and which,when operated from the inside, can be opened without giving the signalon the bell, and in either operation the parts of the lock willautomatically return to their position and lock the bolt in thestriker-plate unless otherwise adjusted. I attain this object by themechanism illustrated in the accompanying drawings, wherein likelletters and figures of reference indicate similar parts in the severalviews, and in which- Figure l is a horizontal section of my improvedlock. Fig. 2 is a longitudinal vertical section of the saine. Fig. 3 isa transverse vertical section of the same on the line a: x of Fig. l.Fig. 4 is asimilar view on the line y y of Fig. l. Fig. 5 is alongitudinal vertical section of the lock on the line a z of Fig. l.Figs. 6 and 7 are detail views of parts of the lock.

A indicates the box or casing; B, the bolt mounted in connectiontherewith; C and G', the knobs upon the outside and inside portion ofthe door D, the centraloperatinglbar, and c and c the tubes or casingssurrounding the bar D between the lock-caseor boxing and the knobs C C.

The bolt B is constructed with an enlarged portion, b, which is adaptedto engage with the striker-plate, and the inner portion thereof, whichis situated within the box or casing A, is constructed of thinner metalthan the outer portion, b, and provided with a central elongated recess,b', to allow the said bolt to slide over the operating parts of thelock, and is also provided with projecting arm b2 in its upperY portion,by which the said bolt is drawn back from the striker-plate by theengagement therewith lof a tumbler-plate when the combination has beenset, as will be more fully hereinafter set forth. The under edge of thesaid bolt B is provided with recessed portions b3 b4L be, which areadapted to pass over parts ofthe mechanism ofthe lock without engagingtherewith, and thereby not interfering with the v operation thereof, asthe said bolt is slid into the lock-casing or outwardly therefrom intothe striker-plate. In the lock-casing A a divisional plate, E, ismounted, havinga central circular recess, e, therein, to permit of thefree revolution of the mechanism passing therethrough.

ln the outer face-plate of the casing A two studs or pins, l l, arerigidly mounted, which are encircled by coiled springs S S, and upon theouter ends of which an apertured plate or yoke, 2, engages and hasmovement thereon in a horizontal plane. On the face of this plate 2,farthest away from the knob C, a washer, 3, is mounted, which isprovided with a central aperture just large enough for the passagetherethrough of the bar D, and with smaller apertures on each side ofthe central aperture, for purposes which willbe'more fully hereinafterdescribed. Resting in the circular recess of the central divisionplateand surrounding the central bar, D, is a cylinder, 4, having a flange,5, adapted to bear against the washer 3. This cylinder 4 is ofconsiderable diameter, and on its opposite end has a tumbler-plate,6,secured or formed therewith. The periphery of this plate 6 isplano-convex in configuration, the edges of the plane surface of whichare provided with projections 7, the upper one of which strikes againstthe projecting arm b2 of the bolt, and when the combination has been setis adapted to slide the said bolt back from the striker-plate andrelease the same. The central portion'of this plate 6 is provided witharecess, 8, extending v therethrough, which has the configuration ot' acog or spur wheel, and which isadapted to receive a cog-tumbler, 9,rigidly secured upon or formed with one side oi' a collar, l0, the opposite side of which collar has a larger cogged tumbler, 1l, formedtherewith,and on the other ICO side of the eogged tumbler 11 asplitcog-tumbler, 12, is mounted separate from said parts. The collar 10 andcogged tumbler 11 and 12 are not so secured upon the bar D as topreventa sliding movement thereof, but to guard against a revolution ofthe said parts upon the said bar, they are formed with squarebearingrecesses in their central portion.

Upon the side of thelock-casing adjacent to the tumblers 11 and 12 twostuds or pins, 13, are mounted, which are encircled by coiled springsS', and over the ends of which the arms 14 of a circular apertured plateor yoke, 15, engage, the aperture in the plate 15 being engaged by thecollar 10 between the cog-tumblers 9 and 11. This plate 15 is depressedbelow the plane of extension of the arms 14, so that it may readilyengage with the collar 10, as hereinbefore set forth.

In the knob C, which is rigidly secured to the outer end of the cylinderor tube o, a sliding plate, 16, is mounted,whichhas movement onguide-rods 17, secured between the two faces of the knob and encircledby coiled springs S2. This plate 16 has two wires, w w, secured thereto,which extend through the tube c, adjacent to the central bar, D, and aresecured in the washer 8, passing through a series of apertures formed ina cogtun1bler, 18, secured to or formed with the washer3, mounted uponthe central bar, D, and having sliding movement only thereon. Inconnection with the plate 16 also are a series of combinationkeys, K K,mounted on suitable rods, k,which are secured to the plate 16, passingthrough the inner face-plate, C2, of theknob C. These combination keys Kare to be ranged in series in a circular line on the inner sides of thefaceplate, and are to be provided with suitable marks, indentations, orprojections upon their outer surfaces for indentitication for thepurpose of releasing the lock by one knowing the combination, which isset by pressing the proper keys, K, into the knob C by means of the handand lingers. There will be a great many more of these keys used than arenecessary for the operation of the parts of the lock, this duplicationbeing used for the purpose of a blind to mystify any one trying to enterthe door upon which the lock is used not knowing the combination. If itis found desirable, the inner periphery of the knob C may be formed witha series of numbers or other characters situated adjacent to the keys K,and the combination of numbers being known the door may be readilyopened. The plate C2 is formed with a series of depressions, ci, intowhich the heads of the keys K may be pressed when operating thecombition of the lock to release the bolt B from the striker-plate. v

Vhen the knobs K are depressed in opening the combination, the wiresrunning from said knobs to the split cog-tumbler 12 are drawn inward,drawing the said cogs 9, 11, and 12 and the yoke 15 inward towardtheknob C. In this operation the inner cog-tumbler,

9, is thrown into the central recess, 8, of the tumbler-plate 6, whenthe knob may be turned and the projections on the tumbler-plate engagewith the projecting arm of the bolt and spring the same back upon itsguide-rod 19, which is encircled by a coiled spring, S, and therebyrelease the bolt from the striker-plate, and the lock may be readilyopened. Before this can be accomplished, however, the Wires yw w,connected to the washer 3, are drawn backward, drawing the said washer,the plate or yoke 2, and the cog-tumbler 18 backward therewith againstthe studs or pins 1 1 and the coiled springs S, as hereinbefore setforth. In drawing these parts backward toward the knob C the cog-tumbler18 is drawn into a sliding rack-plate, 20, mounted in connection withthe lower portion of the casing of the lock. The said rack-plate 20 actsas bearing or rest for the cog-tumbler 18 when drawn toward and engagingthe same, the headed pin 21 being drawn into a recess formed in theplate 2O and holding the same until the cog tumbler 18 engages with thesaid plate. By this means a bearing is provided for the tumbler 18,which steadies the movement thereof, as will be readily understood, andslides when the said tumbler is revolved. In addition to this means ofsafety for securing the bolt a permanent latch is formed with the insideof the lock, and consists of a bar or rod, 22, to the outer end of whichan operating rod or strip, 23, is secured, and to the inner end of whicha locking bolt or strip, 24, is attached, which is adapted to bearagainst the rear portion of the bolt B, and when resting thereagainstthe operation of the combination on the outside will fail to release thebolt, and an attempt to open the lock is frustrated by the use of thedevice just described.

On the inner portion of the lock-casing, and inclosing the cog-tumblers11 and 12 and the yoke 15, a circular plate, 25, is constructedconeavoconvex in form and having a central seat-plate, 26, which isprovided with cogcavities corresponding in configuration to thecogtumblers 11 and 12, said cog-cavities being formed integrally withone end of a collar, 27, the other end of which has a bell-cog, 28,secured thereto. Vhen the outside knob is turned, the central bar, D, ofnecessity will revolve therewith, revolving the cog-tumblers 11 and 12,which rest in the cavities heretofore described, and consequently turnthe bellcog 28 and strike the gong situated at a convenient distancefrom the lock on theinternal portion of the door or in the house. Bythis means it will be seen that as soon as an attempt is made to turnthe outside knob the bell-cog 28 will begin the revolution, and the gongor doorbell be rung thereby, and the occupant of the house will benotified of the attempt to open the door. This will be the operationfrom the outer side of the door.

To operate the lock from the inside of the house the operation will beas follows: Sccured in connection with the casing c is a IOO IIO

spring-plate, 29, to the free end of which a vertically-arranged pin orbolt, 30, is secured, which passes through an aperture, 31, formed inthe said casing c', and is adapted to engage With recesses 32, formed inthe bar D. The knob C and the casing c are adapted to slide upon the barD, and by removing the pin and raising it against the action of thespring 29 the knob and casing may be shoved inward towardthe lockagainst the cog-tumbler 12, which, being arranged, as hereinbeforedescribed, in connection with the yoke 15, presses the said yoke inward,throwing the cog-tumbler 9 in contact with the tumbler-plate 6 andagainst the cylinder 4, which presses the yoke 2 outward toward the knobC and releases the bolt B, as hereinbefore set forth. Thus it will 1 beseen that the lock may be opened either fromthe inside or the outside,that it has been arranged to be opened by the combination, or it may beopened from the inside without the operation of the combination, as just described 5 but in passing through the door upon which this form oflock may be used in either direc tion the bell-cog may be so arrangedthat it will give a signal at the turning of either the inside or theoutside knob, so that a notice.

will be given to the occupants of the house, either when a personattempts to enter the house or to pass therefrom. It will also beobserved that the parts of the lock are so constructed that they willreturn to their normal position through the medium of the yokes andsprings, as described, and for the purposes specified.

The novelty and utility of -my device being obviously apparent, it isnot necessary to further enlarge upon the same herein.

It is obvious that many minor variations in the construction andarrangement of parts may be made and substituted for those shown anddescribed without departing in the least from the nature and principleof my invention.

I do not wish to be limited to the use I may make of my invention, as Iam aware that it can be advantageously employed in other places besidesdoors. I contemplate applying it on tills and safes.

Having thus described my invention, I claim 1. In a combination-lock,the combination,

with the knob G and the bar D, of the wires w, the yoke 2, thetumblerlS, and washer 3, the cylinder 4, the rackplate 20, and thevheaded pin 21, substantiallyas described.

2. The combination, with the bolt B, of the guide-rod 19, encircled by acoiled spring, S, situated in the rear thereof and in connectiontherewith, the ,cylinder 4, over` ,which said bolt B has movement, thetumbler-plate 6, having project-ions 7, and the projecting arm b2 on thebolt B, adapted to be engaged by the projections 7 on the plate 6,substantially as described.

3. rIlhe combination, with the tumblerplate 6, having an aperturetherein, of a cog configuration, the cog-tumbler 9, the collar 10, theeog-tumblers 11 and'12, the yokeplate 15, and the barD, substantially asdescribed.

4. The combination, with the bar D, of the casing c', adapted to slidethereon, and the bell-actuating cog 28, mounted on said sliding casingc', substantially as described.

5. The combination, with the bar D, having the recesses32, of thesliding casing e', the flat spring 29, connected to said casing, the pin30, carried by said spring, the knobs C and C', and the intermediatemechanism described, substantially as set forth.

6. The combination, with yokes 2 and 15,

the tumbler-plate 6, and the tumblers 9 and i 1'2, ot' the rods 1 and13, having movement through the ends of the yokes, and the coiledsprings surrounding said rods, substantially as described.

7. The combination, with the knobs Gand C', bar D, tumblers 13, 9, and12, and springactuated yokes 2 and 15, of the plate C2, the keys K, theplate 16, the rods 17, having coiled springs S2, and the wires w w,substantially as described.

8. The combination, with the knobs C and C, of the rod D, thecog-tumblers 9, 11, and 12,'the yoke 15, the yoke 2, and the wires w w,substantially as described.

9. The combination, with the knob C, of the inner face-plate, C2, havingthe depressions c2, the keys K, the plate 16, the wires w, the Washer 3,and the yoke-plate 2, substantially as described.

IOO

10. The combination, with the tumblers 9, A

11, and 12, the collar 10, the yoke 15, of the casing surrounding saidparts having the central cog-apertured seat, substantially as described.y

11. The combination, with the knobs C and C', the bar D, the wires w,and the casing c,

LOUIS CARL BAU.

Witnesses:

CHAs. NAsLER, I. LovENBERG.

